Lesser Black-backed Gull (graellsii & intermedius)
(last update: June 25, 2012)
Lesser Black-backed Gull graellsii P.K 4CY, July 20 2016, Utrecht, the Netherlands.
Tibia ring coded ZY-PK and metal ring Arnhem NLA 5.501.360. Ringed as pullus on June 20 2013 at Katwijk (Industrieterrein 't Heen), the Netherlands (5212.00 N 425.00 E).
No black on the bill. Large mirror on P10, but still obvious immature features especially in tail. P1-P2 growing, P3-P10 old.